Electrochemical process and device for hydrogen generation and storage

a technology of electrochemical process and hydrogen generation, applied in the direction of electrochemical generators, electrolysis components, electrolytic processes, etc., to achieve the effect of minimizing the extent of hydrogen transport and expanding hydrogen transpor

Inactive Publication Date: 2013-05-16
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0022]In some cell geometries, hydrogen transport over appreciable distances may be required to convey hydrogen from its source within the cell to the cell exterior. Similarly charging hydrogen to the cell interior may involve extensive hydrogen transport. To minimize the extent of transport by diffusion, it may be preferred to incorporate channels or passages in the cell extending from the outer electrode and in communication with the cell exterior. Such channels may enable prompt discharge of hydrogen gas from the electrochemical cell interior during hydrogen generation and prompt loading of the cell interior with hydrogen during hydrogen storage.

Problems solved by technology

Despite fluctuations in such ambient temperatures it is often unnecessary to heat (or cool) the hydrogen generator.

Method used

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  • Electrochemical process and device for hydrogen generation and storage
  • Electrochemical process and device for hydrogen generation and storage
  • Electrochemical process and device for hydrogen generation and storage

Examples

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Embodiment Construction

[0032]The following description of the embodiment(s) is merely exemplary in nature and is not intended to limit the invention, its application, or uses.

[0033]In vehicle applications, chemical storage and release of hydrogen using metal hydrides appears to be an attractive alternative to physical storage of hydrogen which may require one or more of, high pressures, or low temperatures or specially prepared substrates to be viable.

[0034]For example, most hydrides, in the absence of a stimulus, are stable at ambient and near-ambient temperatures of say 10-100° C. so that they may be stored without need for low temperature or high pressure. The volume of hydrogen produced may be changed incrementally by addition of more or less reagent to modify the available vehicle range or to satisfy the needs of vehicles of different sizes and use patterns. Chemical reactions for release of hydrogen may be reversed to regenerate and recharge a spent hydrogen source, either on-vehicle or with suitabl...

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Abstract

Both the reaction of hydride-forming compositions with hydrogen to form hydrides, and the decomposition of such hydrides to release hydrogen may be promoted electrochemically. These reactions may be conducted reversibly, and if performed in a suitable cell, the cell will serve as a hydrogen storage and release device.

Description

TECHNICAL FIELD[0001]This invention pertains to processes and devices for storing and generating hydrogen using reversible electrochemical reactions to both promote decomposition of hydrides for release of hydrogen and formation of hydrides for storage of hydrogen.BACKGROUND OF THE INVENTION[0002]There are many devices which consume hydrogen and produce power. For example, proton exchange membrane fuel cells are being developed currently as power sources for a variety of military, transportation, and electronic device applications. Such fuel cells require that hydrogen, sufficient to generate the required power output, be available when required. Meeting this requirement calls for a high density and energy efficient hydrogen storage technology.[0003]Many such technologies have been proposed and studied including devices that store hydrogen: as compressed hydrogen gas; as cryogenic liquid hydrogen; as hydrogen molecules adsorbed on high surface area supports; as hydrogen atoms at low...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25B1/02C25B11/04
CPCC25B1/02H01M8/0656H01M8/04216Y02E60/50C25D11/04
Inventor VAJO, JOHN J.LI, WENLIU, PINGPINKERTON, FREDERICK E.
Owner GM GLOBAL TECH OPERATIONS LLC
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